Satellite imagery of Dean certainly looks quite impressive. He is a very small storm, as the NHC say TS winds only go out to 50 miles. However, he looks to be getting strongerwith a well defined CDO feature, and hints that an eye may appear shortly. The banding features have improved in the lower levels too. Dean has certainly taken advantage of the improving upper-level conditions, and warming SST's, and could easily strengthen more than the official forecasts suggest.

Erin is also taking advantage of improving conditions,and will probably continue to strengthen up until landfall. My guess would be near 60 mph as a peak intensity. Deep convection is firing over the centre, and banding is improving too. Conditions will now begin to deteriorate across the lower Texas coast as Erin strengthens and approaches.